Unrated
Denial of service in github.com/shamaton/msgpack
The msgpack decoder fails to properly validate the input buffer length when processing truncated fixext data (format codes 0xd4-0xd8). This can lead to an out-of-bounds read and a runtime panic, allowing a denial of service attack.
Announced Group revision 1
Original source ↗CVE-2026-32284
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-32284
github.com/shamaton/msgpack
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
github.com/shamaton/msgpack/v2
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
github.com/shamaton/msgpack/v3
Source reference: /containers/cna/affected/2/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "github.com/shamaton/msgpack",
"product": "github.com/shamaton/msgpack",
"packageName": "github.com/shamaton/msgpack",
"collectionURL": "https://pkg.go.dev",
"defaultStatus": "affected",
"programRoutines": [
{
"name": "Unmarshal"
},
{
"name": "UnmarshalAsMap"
},
{
"name": "UnmarshalAsArray"
},
{
"name": "DecodeStructAsArray"
},
{
"name": "DecodeStructAsMap"
}
]
},
{
"vendor": "github.com/shamaton/msgpack/v2",
"product": "github.com/shamaton/msgpack/v2",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "2.4.1",
"versionType": "semver"
}
],
"packageName": "github.com/shamaton/msgpack/v2",
"collectionURL": "https://pkg.go.dev",
"defaultStatus": "unaffected",
"programRoutines": [
{
"name": "Unmarshal"
},
{
"name": "UnmarshalAsMap"
},
{
"name": "UnmarshalAsArray"
}
]
},
{
"vendor": "github.com/shamaton/msgpack/v3",
"product": "github.com/shamaton/msgpack/v3",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "3.1.1",
"versionType": "semver"
}
],
"packageName": "github.com/shamaton/msgpack/v3",
"collectionURL": "https://pkg.go.dev",
"defaultStatus": "unaffected",
"programRoutines": [
{
"name": "Unmarshal"
},
{
"name": "UnmarshalAsMap"
},
{
"name": "UnmarshalAsArray"
}
]
}
]- Related CVEs
- CVE-2026-32284
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #12066 · Revision 1
- Added to Heist Feed
- Publisher date